Electric-telegraph apparatus.



No.753,690. PATEN-TED MAR. 1,1904.- A. PALGONE.

ELECTRIC TELEGRAPH APPARATUS. APPLICATION mum mu 6, 1903.

12 2. EA 1 A I I7ZV67Zf07? Wifizwwm 1702mm UNITED STATES Patented March1, 1904.

PATENT OFFICE.

: ELEQTRIC TELEGRAPH APPARATUS- SPEGIFIGATION forming part of LettersPatentNo. 753,690, dated March 1, 1904.

Application filed May 6, i903. Serial N0. 155,902. (No model.) i

Toall whom it may concern.-

Be it known that I, AGAZIO FALooNE, sergeant in the Italian Army, asubject of the King of Italy, residing at Florence, in the Kingdom ofItaly, have invented certain new and useful Improvements in and Relatingto Electric-Telegraph Apparatus, of which the following isaspecification.

This invention relates to electric-telegraph apparatus, and has for itschief object to transmit the signals or messages by means of twoalternating induction-currents, one of which is generated by the angularmovement in one direction of an armature of the Siemens or otherappropriate type in a magnetic field and the other of which is generatedby an angular movement of the said armature in the opposite direction asit is returned to its original position. The receiver may be made on theprinciple of the ordinary telegraph-printing receiver, theelectromagnetic part thereof being so arranged that the oscillatorytongue carrying the style will perform a printing stroke when thetransmitter-key is depressed and will remain in this position until saidkey is liberated, whereupon said tongue will assume its originalposition. The duration of the transmitted signal or the length of timethat the style remains in contact with the ribbon upon which itimpresses the signals can thus be prolonged for a longer or shorterperiod, as may be required by the person working the transmitter.

In order that the said invention may be clearly understood and readilycarried into practice, the same will now be described more fully withreference to the accompanying drawings, in which Figure 1 is a sideelevation, and Fig. 2 a front elevation, of the transmitter, the basethereof being in section. Fig. 3 is a sectional side elevation, and Fig.dan under side plan, of the electromagnetic portion of the receiver.

The transmitter consists of an electromagnetic machine composed of oneor more permanent magnets A A, connected together at their poles bysuitable pole-pieces or extensions a, between which is situated thearmature B of the aforesaid Siemens or other appropriate type. Thisarmature is wound with very thin insulated copper wire and its ends aremounted on a rotary spindle 6, divided into two parts insulated fromeach other byebonite or other suitable material. the said armature bymeans of toothed or other gearing b is a Morse or similar key G, bytheactuation of which angular movement is 1mparted to the armature in onedirection when said key is depressed and in the opposite direction whensaid key is released and returned to its original position. This key maycomprise a lever pivoted at 0 to standardscarried by a wooden or otherbase D and provided with a spring 0, which tends to keep the lever inits raised positionthat is to say, in the position in which it isrepresented in Figs. 1 and 2. The said lever has set-screws 0 o near itsopposite ends for limiting the extent of-its oscillations about itspivot, the set-screws having metallic anvils d (Z for them to impingeupon.

The receiver, Figs. 3 and 4, comprises a clockwork device similar tothat used with ordinary telegraph-printing receivers for impartingmovement to the tape or ribbon upon which are impressed by a style thesignals received by the instrument and for distributing theprinting-ink. The electromagnetic part of the receiver may be of thewell-known Sicmens relay type, and then comprises an electromagnet Ebetween the two pole-pieces e of which an oscillatory tongue F isarranged, said tongue being polarized by a permanent magnet G. I Thepole-pieces e e of the electromagnet are made adjustable with respect tothe said tongue, and the amplitude of the oscillations of the latter isregulated by suitablyarranged adjusting-screws f f The aforesaidelectromagnet E is so wound that the pole-piece e on one side of theoscillatory tongue will become of opposite polarity to that of thepole-piece c on the other side of said polarized. tongue when saidelectromagnet is excited. The said pole-pieces are preferably arrangedone above the other with the tongue capable of oscillating between themin a vertical plane. Normally the said tongue lies in contact with thelower pole-piece 6 Upon depressing the key C of the transmitter, andthereby angularly shifting the armature Connected with B, an electriccurrent will be induced in the transmitter and will pass through theline-wire to the electromagnet E of the receiver,where said current will(assuming it to be in the proper direction) cause the lower pole-pieceto be of the same sign as that of the adjacent end of the polarizedoscillatory tongue and the other pole-piece e to be of the oppositesign. The said polarized tongue will therefore be repelled by the lowerpole-piece of the electromagnet and attracted by the upper pole-piece,and will therefore approach said upper pole-piece and perform asignaling stroke. As, however, the current generated by the transmitteris instantaneous, it cannot endure for the whole time that the operatorkeeps the transmitter-key C depressed, but by reason of said tonguebeing polarized by the magnet G, as aforesaid, it remains in contactwith or adjacent to the upper polepiece 6 until the operator releasesthe said transmitter-key and enables the armature of the transmitter toreturn by the reaction of the spring a controlling the key. An electriccurrent is then transmitted to the receiver in the reverse direction tothat of the current previously transmitted, and as a consequence thepolarity of the electromagnet E of the receiver is reversed and thetongue resumes its original position in contact with or adjacent to thelower pole-piece e of the electromagnet. The necessary length of timethat the style of the receiver must remain in contact with the tape orribbon for impressing thereon the dot-and-dash signs of the Morsealphabet is thus obtained.

Although the invention has been described in connection with telegraphapparatus for sending and receiving Morse signals, it is to beunderstood that the invention is not limited thereto, but is applicableto any telegraphic system in which the signaling can be efiected bytransmitting electric currents alternately first in one direction andthen in the opposite direction.

What I claim, and desire to secure by Letters Patent of the UnitedStates, is-

1. In electric-telegraph transmitting apparatus, the combination with apermanent magnet and an armature located between the poles of saidmagnet, of a Morse transmitting-key connected with said armature, andmeans whereby the rocking of said key about its pivot directly impartsto the armature an angular movement in opposite directions,substantially as described.

2. In electric-telegraph transmitting apparatus, the combination with apermanent magnet and an armature located between the poles of saidmagnet, of a toothed member on the armature, a Morse transmitting-key,and a toothed arc thereon gearing with said toothed member of thearmature, substantially as and for the purpose described.

In testimony whereof I have hereunto set my hand, in presence of twosubscribing witnesses, this 25th day of April, 1903.

AGAZIO FALCONE.

I/Vitnesses:

GIUsEPPE BENAY, ALBERTA LEVY.

